在Apache 24中部署python flask应用程序 [英] deploying python flask application in apache 24

问题描述

我已经开发了python(python 3.6 32位)flask应用程序，我需要将其部署在具有apache24 32bit的Windows服务器中.

I have developed a python (python 3.6 32bit) flask application and I need this to be deployed in a windows server with apache24 32bit.

我在中引用了步骤https://medium.com/@madumalt/flask-app-deployment-in-windows-apache-server-mod-wsgi-82e1cfeeb2ed

当我尝试在apache24中启动httpd.exe时，出现以下错误

When I try to launch the httpd.exe in apache24 am getting the below error

[Sun Jun 21 20:36:15.112840 2020] [mpm_winnt:notice] [pid 20600:tid 476] AH00455: Apache/2.4.43 (Win32) mod_wsgi/4.7.1 Python/3.6 configured -- resuming normal operations
[Sun Jun 21 20:36:15.112840 2020] [mpm_winnt:notice] [pid 20600:tid 476] AH00456: Apache Lounge VS16 Server built: Apr 21 2020 16:02:41
[Sun Jun 21 20:36:15.112840 2020] [core:notice] [pid 20600:tid 476] AH00094: Command line: 'httpd.exe -d C:/Apache24'
[Sun Jun 21 20:36:15.123841 2020] [mpm_winnt:notice] [pid 20600:tid 476] AH00418: Parent: Created child process 2064
Fatal Python error: Py_Initialize: unable to load the file system codec
ModuleNotFoundError: No module named 'encodings'

Current thread 0x00002dfc (most recent call first):
[Sun Jun 21 20:36:21.808509 2020] [mpm_winnt:crit] [pid 20600:tid 476] AH00419: master_main: create child process failed. Exiting.

Please find the SET configurations below,
OS=Windows_NT
Path=C:\Python36-32\Scripts\;C:\Python36-32\;C:\Program Files\Common Files\Micro
soft Shared\Microsoft Online Services;C:\Program Files (x86)\Common Files\Micros
oft Shared\Microsoft Online Services;C:\ProgramData\Oracle\Java\javapath;C:\Wind
ows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowe
rShell\v1.0\;C:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\


PYTHONHOME=C:\Python36-32\
PYTHONPATH=C:\Python36-32\Scripts\

推荐答案

#1检查您是否安装了OLD python，并正确删除了它(包括旧环境vars，路径..)

#1 check if you have an OLD python installation and remove it properly (including old environment vars, path ..)

#2如果可能的话，我建议您将python安装升级到最后一个3.8.x +

#2 i would recommend you, if possible, upgrading your python installation to the last one 3.8.x +

#3您的问题很普遍:您的环境变量设置不正确:

#3 your problem is very common: your environment variables are NOT correctly set:

• 转到"系统属性"下的"高级"标签，然后单击"环境变量
".
• 在系统变量下创建这些变量:
  • APACHE_HOME = C:\ wamp \ bin \ apache \ apache2.4.23(我正在使用 WAMPSERVER )
  • MOD_WSGI_APACHE_ROOTDIR = ％APACHE_HOME％(由于您使用的是 mod_wsgi ，请检查官方
  • go to Advanced tab under System Properties and click Environment Variables
  • Under System Variables create those variables:
    • APACHE_HOME = C:\wamp\bin\apache\apache2.4.23 (i'm using WAMPSERVER)
    • MOD_WSGI_APACHE_ROOTDIR = %APACHE_HOME% (since you are using mod_wsgi, check official doc on pypi)
    • PYTHON_HOME = C:\Python37 (it depends on your python installation)
    • PATH = ％APACHE_HOME％\ bin;％MOD_WSGI_APACHE_ROOTDIR％;％PYTHON_HOME％;％PYTHON_HOME％\ Scripts;

    #4打开新控制台并检查您的python安装:

    #4 open new console and check your python installation:

    • python --version

    #5创建一个简单的flask应用程序，以确保一切正常工作

    #5 create a simple flask app to make sure everything is working as expected

    • py -m flask运行

    #6将应用程序部署在 Apache 服务器上，请查看此 flask

    #6 to deploy the app on Apache server, have look at this flask doc and the official mod_wsgi doc

    • 您必须安装 mod_wsgi 全球，这意味着您必须先停用当前活动应用程序的虚拟环境.
    • (venv)C:\ myapps \ flask \ helloflask>停用(我正在使用 venv 标准和默认的python虚拟环境 py -m venvvenv )
    • C:\ myapps \ flask \ helloflask> pip install mod_wsgi
    • C:\ myapps \ flask \ helloflask>点列表
    • you have to install mod_wsgi GLOBALLY, meaning you have to deactivate first your virtual environment of your current active application.
    • (venv) C:\myapps\flask\helloflask>deactivate (i'm using venv the standard and default python virtual environment py -m venv venv)
    • C:\myapps\flask\helloflask>pip install mod_wsgi
    • C:\myapps\flask\helloflask>pip list

    #7在 Apache 服务器

    • 检查 mod_wsgi 是否已正确安装和配置
    • check if mod_wsgi is correctly installed and configured

    C:\myapps\flask\helloflask>mod_wsgi-express --help
    Usage: mod_wsgi-express command [params]
    
    Commands:
        module-config
        module-location
    
    mod_wsgi-express: error: Invalid command was specified.
    

    • 运行此命令:

    mod_wsgi-express module-config
    

    • 命令的输出应类似于以下内容(取决于您的系统和python安装):

        WSGIPythonHome "c:/python37"
        LoadFile "c:/python37/python37.dll"
        loadmodule wsgi_module "c:/python37/lib/site-packages/mod_wsgi/server/mod_wsgi.cp37-win32.pyd"
    

    • 复制以上命令的输出，并将其粘贴到 C:\ wamp \ bin \ apache \ apache2.4.23 \ conf 中.为使内容一致，请找到列出模块的部分，然后将其添加到列表的末尾.
    • Copy the output of the above command and paste it in C:\wamp\bin\apache\apache2.4.23\conf. To make things consistent, locate the section where Modules are listed and add it at the very end of the list.

    #8在项目根目录下创建 wsgi.py 并粘贴代码(这是不言自明的)

    #8 create wsgi.py under the root of your project and paste the code (it's self-explanatory)

    import os
    import sys
    
    # activate virtualenv
    PROJECT = "helloflask"
    
    # i'm using py -m venv venv
    # @see: https://modwsgi.readthedocs.io/en/develop/user-guides/virtual-environments.html
    # @see: https://stackoverflow.com/questions/25020451/no-activate-this-py-file-in-venv-pyvenv
    activate_this = os.path.join('C:/myapps/flask', PROJECT, 'venv/Scripts/activate_this.py')
    with open(activate_this) as file_:
        exec(file_.read(), dict(__file__=activate_this))
    
    BASE_DIR = os.path.join(os.path.dirname(__file__))
    if BASE_DIR not in sys.path:
        sys.path.append(BASE_DIR)
    
    from helloflask import create_app
    application = create_app() 
    

    #9为Flask应用配置虚拟主机

    #9 Configure a Virtual Host for the Flask App

    <VirtualHost *:80>
    
        ServerName helloflask.local
    
        DocumentRoot "C:/myapps/flask/helloflask"
    
        WSGIScriptAlias / "C:/myapps/flask/helloflask/wsgi.py"
    
        <Directory "C:/myapps/flask/helloflask">
            Require all granted
        </Directory>
    
        # app = Flask(
        #    __name__, 
        #    static_url_path='/public/static',
        #    static_folder='static'
        # )
        # Alias /public/static  "C:/myapps/flask/helloflask/public/static"
        # <Directory "C:/myapps/flask/helloflask/public/static">
        #    Require all granted
        # </Directory>
        
        ErrorLog "C:/wamp/logs/helloflask.error.log"
        CustomLog "C:/wamp/logs/helloflask.access.log" common
    
    </VirtualHost>
    

    #10检查您的 Apache 配置

    • httpd -t 如果可以，请重新启动您的 Apache 服务器
    • httpd -t if it's OK, restart your Apache server

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